An attempt to fix the tests.

test/mjsunit/array-splice.js

Index: test/mjsunit/array-splice.js
diff --git a/test/mjsunit/array-splice.js b/test/mjsunit/array-splice.js
index 887097db61c151d82a41ffb11f9b17395954130b..dda53a05c759c85a9960d5414bc6ccb361250aaa 100644
--- a/test/mjsunit/array-splice.js
+++ b/test/mjsunit/array-splice.js
@@ -31,13 +31,13 @@
     var array = new Array(10);
     var spliced = array.splice(1, 1, 'one', 'two');
     assertEquals(1, spliced.length);
-    assertFalse(0 in spliced, "0 in spliced");
+    assertFalse(0 in spliced, "0 in spliced: " + spliced);
 
     assertEquals(11, array.length);
-    assertFalse(0 in array, "0 in array");
+    assertFalse(0 in array, "0 in array: " + array);
     assertTrue(1 in array);
     assertTrue(2 in array);
-    assertFalse(3 in array, "3 in array");
+    assertFalse(3 in array, "3 in array: " + array);
   }
 })();